CN114964551A - Ground source heat pump monitoring method - Google Patents
Ground source heat pump monitoring method Download PDFInfo
- Publication number
- CN114964551A CN114964551A CN202210546143.7A CN202210546143A CN114964551A CN 114964551 A CN114964551 A CN 114964551A CN 202210546143 A CN202210546143 A CN 202210546143A CN 114964551 A CN114964551 A CN 114964551A
- Authority
- CN
- China
- Prior art keywords
- monitoring
- temperature
- holes
- ground
- groundwater
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000012544 monitoring process Methods 0.000 title claims abstract description 160
- 238000000034 method Methods 0.000 title claims description 23
- 239000003673 groundwater Substances 0.000 claims abstract description 65
- 239000000523 sample Substances 0.000 claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 78
- 230000008859 change Effects 0.000 claims description 16
- 239000002689 soil Substances 0.000 claims description 9
- 238000011144 upstream manufacturing Methods 0.000 claims description 9
- 238000012360 testing method Methods 0.000 claims description 8
- 238000009529 body temperature measurement Methods 0.000 abstract description 7
- 238000004134 energy conservation Methods 0.000 abstract 1
- 230000007613 environmental effect Effects 0.000 abstract 1
- 238000009792 diffusion process Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 9
- 238000010438 heat treatment Methods 0.000 description 7
- 238000011161 development Methods 0.000 description 6
- 230000018109 developmental process Effects 0.000 description 6
- 238000012546 transfer Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005755 formation reaction Methods 0.000 description 3
- 238000012806 monitoring device Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K13/00—Thermometers specially adapted for specific purposes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B30/00—Heat pumps
- F25B30/06—Heat pumps characterised by the source of low potential heat
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/14—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
The invention discloses a ground source heat pump monitoring system, and aims to solve the technical problems that in the prior art, monitoring is inaccurate, consumption is high, and energy conservation and environmental protection are not realized to the maximum extent during system operation. The scheme of this application is through laying ground temperature monitoring hole, the heat affected radius monitoring hole of specific position, be triangle-shaped distribution groundwater monitoring hole, and sets up the temperature probe of different quantity degree according to the corresponding position department of stratum structure on the temperature measurement cable, realizes that the controller is according to the data dynamic adjustment system operation data of collecting, and then makes the system more energy-conserving, and the maximum protection geological environment.
Description
Technical Field
The invention relates to the technical field of energy equipment monitoring, in particular to a ground source heat pump monitoring method.
Background
The ground source heat pump extracts low-grade heat energy (10-25 ℃) in shallow underground rock mass and water body through a buried pipe, and the heat pump is utilized to extract the low-grade heat energy into high-grade heat energy to realize heating; in summer, high temperature in the ground building is discharged to the ground through the buried pipe for energy exchange, so that the aim of refrigeration is fulfilled.
Due to the complexity of factors affecting heat exchange underground, the heat accumulation effect caused by untimely and effective diffusion of heat often occurs in actual operation, so that imbalance between heat release and heat absorption is caused, and further the surrounding geological environment is affected. And the heat exchange host and the high-power water pump belong to high-energy-consumption equipment, if the system does not consider underground heat exchange environment change and runs for a long time in a single state, a lot of unnecessary energy loss can be brought, and even the geological environment is damaged by the energy loss.
The inventor knows that a buried pipe ground source heat pump heat exchange system site ground temperature monitoring system and method (CN 113008401A) discloses a buried pipe ground source heat pump heat exchange system site ground temperature monitoring system, the buried pipe area monitoring device comprises at least one first monitoring hole and one second monitoring hole, wherein the first monitoring hole is arranged between two heat exchange holes, and a plurality of temperature sensors are arranged in the first monitoring hole along the height direction; the second monitoring hole is arranged in the heat exchange hole for placing the buried heat exchanger, and a plurality of temperature sensors are also arranged in the second monitoring hole along the height direction of the second monitoring hole; the peripheral monitoring device comprises at least two third monitoring holes which are different in distance from the pipe burying area, and a plurality of temperature sensors are arranged in the third monitoring holes along the height direction and used for monitoring the ground temperature at different distances from the pipe burying area; the ground temperature background value monitoring device comprises a fourth monitoring hole which is arranged far away from the buried pipe area. When the temperature sensors in the first monitoring hole, the second monitoring hole, the third monitoring hole and the fourth monitoring hole are arranged, 26m is provided with one temperature sensor at intervals of every 2 m; 26m one temperature sensor is arranged at intervals of every 10m in depth.
However, in the process of implementing the technical solution in the embodiment of the present application, the inventors of the present application find that the above-mentioned technology has at least the following technical problems:
the field ground temperature monitoring data is incomplete, the influence of groundwater runoff on field heat exchange can not be judged by the peripheral monitoring holes and the ground temperature background value monitoring holes, and then the system operation parameters can not be adjusted according to the heat diffusion influence of groundwater, so that the system can not be more energy-saving. In addition, because the heat conductivities of different stratums are different, the sensor setting of this technical scheme to the temperature measurement hole can't monitor the change of different stratum ground temperatures, and then can't overall compromise the real comprehensive heat transfer effect of each stratum to the realization is to the regulation and control of system's heat transfer process.
The information disclosed in this background section is only for enhancement of understanding of the background of the disclosure and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art that is known to a person skilled in the art.
Disclosure of Invention
In view of at least one of the above technical problems, the present disclosure provides a ground source heat pump monitoring system, which accurately and reliably monitors a geological environment and a heat exchange process, and ensures stability of the environment and high efficiency and energy saving of the system.
According to one aspect of the present disclosure, there is provided a ground source heat pump monitoring method, including the steps of:
(1) carrying out shallow geothermal resource exploration, obtaining site thermophysical property data according to a rock-soil thermophysical property test, and determining a site stratum structure and a variable temperature zone depth;
(2) a ground temperature monitoring hole for monitoring the change of the ground temperature of the field is distributed in the center of the field;
(3) at least three heat affected radius monitoring holes are distributed beside any heat exchange hole at the downstream edge of the underground water of the field along the flow direction of the underground water, and at least three heat affected radius monitoring holes are distributed beside any heat exchange hole at the upstream edge of the underground water of the field and are vertical to the flow direction of the underground water;
(4) underground water monitoring holes are respectively arranged at the upstream and downstream of underground water outside the heat exchange field and at the center of the underground water flow direction in the heat exchange field, and three holes are distributed in a triangular shape;
(5) arranging temperature measuring probes at corresponding positions of each stratum on a temperature measuring cable according to the stratum structure, arranging at least one temperature measuring probe at a corresponding position of each stratum on the temperature measuring cable, and encrypting the distribution density of the temperature measuring probes in a corresponding range of a stratum temperature change zone;
(6) putting the manufactured temperature measuring cables into the monitoring holes in sequence, and additionally arranging a water quality detector and/or a water level gauge in the underground water monitoring holes;
(7) respectively and correspondingly arranging corresponding individual temperature, flow and pressure sensors in a main water inlet pipeline and a main water outlet pipeline at a ground source side and a user side, and connecting the sensors and pump frequency converters arranged in each pipeline and monitoring holes into a computer room data acquisition control unit;
(8) the controller dynamically adjusts the system operation data according to the collected data: when the temperature difference between the outdoor environment and the ground in the site and the temperature difference between the user side inlet water and the user side outlet water are respectively greater than the set temperature, adjusting the corresponding unit heat pump and the water pump to enter a low-power operation mode; when the temperature difference is respectively smaller than the set temperature, adjusting the heat pump and the water pump of the unit to enter a high-power operation mode; when the temperature data of the heat affected radius monitoring holes perpendicular to the groundwater flow direction are larger than the temperature data of the heat affected radius monitoring holes corresponding to the radius along the groundwater flow direction, the heat exchange power of the system is correspondingly improved until the two monitoring data are equal.
In some embodiments of the disclosure, in the step (2), one or more ground temperature monitoring holes are arranged according to the area of the heat exchange site, and are uniformly distributed in the site, and the hole depth is 2m or more deeper than the heat exchange holes.
In some embodiments of the disclosure, in the step (2), one or more ground temperature monitoring holes are arranged according to the stratum structure of the heat exchange field, so that the monitoring holes are ensured to be positioned in the center of the areas of the same or different stratum structures.
In some embodiments of the present disclosure, in the step (3), the distance between adjacent heat-affected-radius monitor holes in the same distribution direction is 1-2 m.
In some embodiments of the disclosure, in the step (4), the groundwater monitoring holes located outside the field are more than 50m away from the edge of the field, and an angle formed between a connecting line of any two groundwater monitoring holes and the groundwater flow direction is more than 15 degrees.
In some embodiments of the present disclosure, in the step (5), the thermometric probes within the temperature-variable zone are densely arranged at 2.5m intervals.
In some embodiments of the present disclosure, in the step (6), the groundwater monitoring hole sensor probe is located at a depth below the groundwater level.
In some embodiments of the present disclosure, in the step (8), the adjusting of the power operation mode is specifically adjusting of a unit power and a water pump frequency converter parameter.
One or more technical solutions provided in the embodiments of the present application have at least any one of the following technical effects or advantages:
1. because a series of heat-affected radius monitoring holes are respectively arranged along the two directions of underground water and vertical underground water, and a certain distance is kept between the holes, the problem of incomplete ground temperature geological monitoring data is effectively solved, the monitoring of the influence of different degrees of underground water runoff on heat diffusion in different seasons and different climates and other environments is further realized, and an important reference basis is provided for the adjustment of system operation parameters.
2. The inventor knows that in 4.2.1 of the technical specification of underground water environment monitoring of HJ 164-containing 2020, monitoring points are distributed along the main flow direction of underground water and the auxiliary flow direction of vertical underground water for a monitoring area with a large area. According to the technical scheme, the groundwater monitoring holes are distributed in a triangular mode, the monitoring holes are located on the ground, in the middle and at the downstream, the conventional technical thought that monitoring points are distributed by combining the groundwater flow direction as a main part and the vertical groundwater flow direction as an auxiliary part, which are pointed out in the technical specification for groundwater environment monitoring, is broken through, the upstream groundwater monitoring holes are used as comparison holes, the groundwater monitoring holes in the field at the midstream realize the influence monitoring on the heat exchange holes in the field with the largest influence degree, the groundwater monitoring holes at the downstream monitor the environment after the formation is adjusted, and the angle formed between the connecting line between any two groundwater monitoring holes and the groundwater flow direction is larger than 15 degrees, so that the groundwater monitoring holes at all places can simultaneously take the influences along the groundwater flow direction and the direction perpendicular to the groundwater flow direction into consideration. The arrangement method realizes maximum monitoring by using the least number of monitoring holes.
3. Because all be equipped with at least one temperature probe in each stratum, and the alternating temperature area is encrypted the setting, effectively solved the insufficient problem of control to stratum heat dissipation, and then realized giving consideration to the overall planning of different heat transfer capacities in each stratum, the whole system heat exchange efficiency of nimble developments accent.
Drawings
Fig. 1 is a schematic diagram of a heat exchange field planning in an embodiment of the present application.
Fig. 2 is a schematic view of a formation structure according to an embodiment of the present application.
Fig. 3 is a schematic layout view of ground temperature monitoring holes in an embodiment of the present application.
FIG. 4 is a schematic view of the arrangement of heat-affected radius monitoring holes perpendicular to the groundwater flow direction in one embodiment of the present application.
FIG. 5 is a schematic view of the arrangement of heat-affected radius monitoring holes along the groundwater flow direction in one embodiment of the present application.
FIG. 6 is a schematic diagram illustrating arrangement of groundwater monitoring holes in an embodiment of the present application.
FIG. 7 is a schematic diagram of a temperature measuring cable with a temperature measuring probe according to an embodiment of the present application.
In the above figures, 1 is a first heat exchange field below a landscape lake, 2 is a second heat exchange field below a green belt, 3 is a ground temperature monitoring hole, 4 is a heat influence radius monitoring hole which is perpendicular to the groundwater flow direction, 5 is the groundwater flow direction,
6 are heat affected radius monitoring holes along the groundwater flow direction, 7 is a temperature measuring cable, and 8 is a temperature measuring probe.
Detailed Description
References in this application to "first," "second," etc. are used to distinguish between the objects described and not to have any sequential or technical meaning. The term "connected" and "coupled" when used in this application includes both direct and indirect connections (couplings), unless otherwise specified.
The programs referred to or relied on in the following embodiments are all conventional programs or simple programs in the art, and those skilled in the art can make routine selection or adaptation according to specific application scenarios.
The unit modules (components, structures, and mechanisms) and the devices such as sensors in the following examples are all conventional commercial products unless otherwise specified.
For better understanding of the technical solutions of the present application, the technical solutions will be described in detail below with reference to the drawings and specific embodiments.
Example one
The embodiment discloses a ground source heat pump monitoring method, in particular to a method for building a second-period ground in a yellow river welcome hotelThe source heat pump project is taken as an example, and the heating (cooling) area of the source heat pump project is 32250m 2 Referring to fig. 1, the heat exchange holes are respectively designed into a first heat exchange field below the landscape lake and a second heat exchange field below the green belt, the hole diameter is 180mm, and the hole depth is 150 m. The method comprises the following steps:
(1) the method is used for surveying shallow geothermal resources of an engineering field, exploring information such as groundwater flow direction and groundwater level, and performing geotechnical thermophysical property testing. According to the survey of the early stage site topography and landform, and because the building area of the ground source heat pump system is more than 10000m 2 Therefore, 2 rock-soil thermal property test holes respectively positioned at the north side edge and the south side edge of the first heat exchange field and 2 rock-soil thermal property test holes respectively positioned at the northwest corner and the southeast corner of the second heat exchange field are planned. And acquiring and recording rock-soil thermal physical property parameters of each test hole by adopting a rock-soil thermal physical property tester and a digital well temperature instrument.
And determining a temperature change zone of the site stratum structure. Referring to fig. 2, the stratigraphic structure composition of the field is determined based on the test hole drilling record. On the other hand, due to the imbalance between the heat absorption and the heat dissipation of the surface layer of the earth crust, the earth temperature field at the shallow part of the earth crust can be divided into a temperature variation zone, a constant temperature zone and a temperature increasing zone from top to bottom. The temperature-changing zone is positioned at the uppermost part of the earth crust and is mainly influenced by the heat of solar radiation, so that the temperature of the temperature-changing zone is changed periodically. The constant temperature zone is under the temperature changing zone, the solar radiation heat and the earth internal heat reach balance mutually, and the temperature of the zone is not changed all the year round. The temperature increasing zone is positioned below the constant temperature zone and is mainly controlled by the heat in the earth, and the temperature increases along with the increase of the depth. Therefore, different formations have different thermal contributions to the heat exchanger, and thus different monitoring levels are required for different temperature zones. And determining the temperature change zone of the field area to be 15-30m according to the geological exploration and rock-soil thermophysical parameter recording results.
(2) According to geological survey data, judging that stratum structures of all regions of the heat exchange field do not have obvious fluctuation changes, so according to the size of the field regions of the two heat exchange fields, referring to fig. 3, 2 geothermal monitoring holes are distributed in a first heat exchange field below a landscape lake with a slightly larger area, the first heat exchange field is divided into two regions with approximately equal areas according to the terrain, and the two monitoring holes are respectively distributed in the centers of the two regions; 1 ground temperature monitoring hole is arranged at the center of a second heat exchange field below a slightly smaller area of the green belt, and the ground temperature monitoring hole is mainly used for monitoring the ground temperature change of the field during the operation of a project.
In other embodiments, the stratum structures in different areas of the heat exchange site are obviously changed, and the stratum thicknesses in different areas are different, so that a ground temperature monitoring hole is arranged in the center of each area, and the ground temperature data of the site areas can be comprehensively acquired.
In other embodiments, the stratum structure of the heat exchange site has no obvious change, and the heat exchange site is smaller, so that only one ground temperature monitoring hole is arranged at the approximate center of the heat exchange site.
In addition, because the heat exchange tube of heat transfer hole bottom can produce the influence to the ground temperature environment around the hole bottom, consequently, for the precision and the accuracy of ground temperature control, so confirm the hole depth of ground temperature monitoring hole as 152m, more than the heat transfer hole drilling depth 2m to the ground temperature change of accurate monitoring heat transfer hole bottom.
(3) And distributing heat affected radius monitoring holes. Referring to fig. 4-5, the groundwater flow in the field may affect the groundwater thermal diffusion, so that the ground temperature around the heat exchanging hole changes, the groundwater has the greatest influence on the thermal diffusion of the heat exchanging hole in the direction along the flow direction of the groundwater, the groundwater has the least influence on the thermal diffusion of the heat exchanging hole in the direction perpendicular to the flow direction of the groundwater, and the influence effect on the thermal diffusion is accumulated continuously when the groundwater flow passes through the heat exchanging field, so a thermal influence radius monitoring hole distributed along the direction of the groundwater flow is arranged beside any heat exchanging hole at the downstream edge of the groundwater in the field, and a thermal influence radius monitoring hole distributed perpendicular to the direction of the groundwater flow is arranged beside any heat exchanging hole at the upstream edge of the groundwater in the field.
The distance between the heat-affected radius monitoring holes is 1m, 4 monitoring holes are respectively arranged in each direction, and the hole depth is 155m and 3m deeper than the ground temperature monitoring holes in consideration of the fact that the bent pipe of the U-shaped pipe in the heat exchange hole participates in heat exchange and the heat conductivity of water is better than that of rock soil at the bottom of the heat exchange hole. The heat affected radius monitoring hole is mainly used for monitoring the change conditions of the geothermal heat and the environment around the site caused by the seepage of underground water during the operation of geothermal engineering. In other embodiments, the heat-affected radius is any distance from 1 to 3 m.
(4) In order to monitor changes of underground water temperature, water quality and the like possibly caused by the operation of a ground source heat pump system, underground water around a site needs to be monitored. Therefore, 3 underground water monitoring holes are distributed along the underground water flow direction of the field from the upstream direction to the downstream direction. And 3 groundwater environment monitoring holes are distributed in a triangular distribution in consideration of comprehensive monitoring and cost saving.
Referring to fig. 6, according to the terrain and hydrological conditions of the heat exchange field, the groundwater in the heat exchange field flows from the northwest direction to the southeast direction, a first groundwater monitoring hole is arranged in a green belt 50m away from the groundwater upstream heat exchange field, and the hole depth is 167 m; a second underground water monitoring hole is arranged in the middle of the field, and the depth of the hole is 167 m; arranging a third underground water monitoring hole with a hole depth of 167m on an open ground 50m away from the underground water downstream heat exchange field; and a connecting line between two underground water monitoring holes outside the site forms an included angle of 45 degrees with the flow direction of underground water, and a connecting line between a first underground water monitoring hole and a second underground water monitoring hole forms an included angle of 15 degrees with the flow direction of underground water. In other embodiments, groundwater monitoring holes at locations upstream and downstream outside the site are greater than 50m from the edge of the site. The influence of the ground source heat pump on the geological environment such as the ground temperature, the water quality and the like can be accurately known through the underground water monitoring hole, and further, basic parameters are provided for the development and utilization operation of the geothermal energy.
(5) And arranging a temperature sensor. The temperature in each monitoring hole is monitored in real time by adopting a mode of a temperature measuring cable heating degree probe. Referring to FIG. 7, the monitoring levels at different locations are determined based on the stratigraphic structure of the survey data record. According to exploration, the depth of a temperature change zone of an area where a field is located is 15-30m, and in view of the fact that the stratum temperature change amplitude in the temperature change zone is relatively large, temperature measurement probes are arranged at the corresponding positions of the temperature measurement cables corresponding to the range of the temperature change zone at intervals of 2.5m, and the temperature measurement probes are arranged at the central positions of the temperature measurement cables corresponding to the rest of strata in the corresponding ranges, so that the aim of monitoring the ground temperature of each layer is fulfilled. After the temperature measuring cables are manufactured, the temperature measuring cables are sequentially and correspondingly placed into the corresponding monitoring holes.
(6) In order to monitor the influence of the heat exchange field on the underground water environment, a temperature sensor, an automatic water level meter and an automatic water quality monitoring meter are required to be arranged in an underground water monitoring hole to monitor the water level and the water quality of the underground water in real time. The temperature sensor adopts a temperature measuring cable with a temperature probe, the temperature probe is arranged below the underground horizontal plane, the automatic water quality monitoring meter specifically adopts a drop-in monitoring instrument (three-in-one), can monitor parameters such as turbidity, pH and conductivity of underground water, can display monitoring data on site and has the capacity of remotely transmitting signals; the automatic water level meter also adopts a 24V power supply input type liquid level meter, the liquid level monitoring range is 0-50 m, and the automatic water level meter can display monitoring data on site and has the capacity of remotely transmitting signals.
In addition, in order to monitor the microorganism condition of underground water in the field in the process of geothermal development and utilization, 1 group of water samples are respectively taken in a monitoring well in a manual mode before each heating period and each cooling period start and after the heating period and the cooling period stop, and the water samples are sent to a laboratory for microorganism testing. The run time was manually sampled every 15 days for 1 group to understand the changes of microbes in the groundwater during the geothermal exploitation process.
(7) A temperature sensor, a flow sensor and a pressure sensor are respectively arranged in a water inlet main pipeline and a water outlet main pipeline on the machine room ground source side and the user side and used for acquiring temperature, flow and pressure information of a middle circulation medium of the pipelines, the temperature sensor adopts a DS18B20 type temperature measurement sensor, the flow sensor adopts an automatic control intelligent water meter, and the pressure sensor adopts a Honeywell type water pipe pressure sensor. In addition, each sensor is provided with a remote output interface, and a data acquisition device such as an RTU, a PLC, a single chip microcomputer and the like is used for acquiring monitoring data to provide a control basis for the monitoring system.
(8) And (5) dynamically adjusting the system. The acquisition of the monitoring data realizes the automatic acquisition at set intervals, the data is acquired once every 10 minutes during the operation of the heat pump system, and the data is acquired once every 12 hours during the stop of the heat pump system.
Monitoring data shows that the temperature difference between the outdoor environment temperature and the ground temperature monitoring temperature exceeds a set temperature difference by 10 ℃, and when the temperature difference of inlet and outlet water of a user side is greater than 6 ℃, a low-power operation mode is adopted, a control system automatically reduces the power of a heat pump unit and adjusts a pump frequency converter to reduce the flow speed of circulating water, and partial heat supply or refrigeration effect is realized by means of the heat conduction effect of natural temperature difference. When the temperature difference between the outdoor environment temperature and the ground temperature monitoring temperature does not exceed the set temperature difference by 10 ℃ and the temperature difference between the user side inlet water and the user side outlet water is less than 6 ℃, a high-power operation mode is adopted, the working power of a heat pump unit is automatically increased by the system, the pump frequency converter is adjusted to accelerate the flow rate of circulating water, and normal heat exchange is guaranteed. Therefore, the system reduces the operation energy consumption to the maximum extent and realizes energy-saving control.
When the temperature data measured by the monitoring holes perpendicular to the groundwater flow direction heat affected radius are larger than the temperature data of the monitoring holes corresponding to the radius and flowing to the heat affected radius along the groundwater flow direction, the temperature data are relatively less affected by the groundwater heat diffusion effect in the direction perpendicular to the groundwater flow direction, so that the temperature data are used as reference values, when the temperature data are larger than the temperature data in the monitoring holes corresponding to the radius and flowing to the groundwater flow direction, the groundwater has a promoting effect on the heat diffusion, the heat exchange power of the system is correspondingly improved until the two monitoring data are equal, and the heat effect of the groundwater is utilized to the maximum extent to realize the energy-saving operation of the system.
On the other hand, monitoring data in each monitoring hole outside the field is used as a background value, monitoring data in each monitoring hole in the field is used as an influence value, and the influence of the geothermal development on the environment is evaluated by using the difference value between the background value and the influence value so as to ensure the sustainability and rationality of the geothermal development. When the difference value is large, the local geothermal environment abnormality of the heat exchange field due to the heat effect phenomenon is shown, the heat exchange rate of the system needs to be correspondingly reduced, and the heat exchange operation power of the system is properly reduced. And the monitoring data of each monitoring hole is used as an initial value when the system is operated for the first time, the monitoring data of the corresponding heating (refrigerating) period of the rest years is used as a contrast value, the difference between the monitoring data and the monitoring data is used as a control basis, the heat exchange efficiency of the system is correspondingly adjusted, the geological parameters of the later year are ensured to be equal to the initial value, the stability of the environment is ensured, and the sustainability of heat exchange is further realized.
Totally arranging 360 vertical buried pipes in the second-stage project of newly building the yellow river hotel, wherein 152 holes are arranged in the first heat exchange field below the green belt, and 20 holes are arranged in the first heat exchange field below the landscape lake8 holes. The effective heat exchange depth of a single hole is 150m, the distance between the heat exchange holes is 5m, double U-shaped pipes are arranged in the holes, and the heating (refrigerating) building area is 31350m 2 And the landscape lake bottom heat exchange holes adopt a double-layer impermeable structure of clay and impermeable membranes, and the heat exchange holes and pipelines are arranged below the landscape lake, so that the heat exchange of soil source ground buried pipes is facilitated, and underground space resources are effectively saved. Through statistics, compared with the traditional ground source heat pump system, the heat exchange efficiency of the ground source heat pump system is improved by 10%, the stability of the geological environment can be kept, and the economic, green, stable, sustainable and high-quality coordinated development of the region is effectively promoted.
While certain preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, the present invention is intended to include such modifications and variations, provided they come within the scope of the appended claims and their equivalents.
Claims (8)
1. A ground source heat pump monitoring method is characterized by comprising the following steps:
(1) carrying out shallow geothermal resource exploration, obtaining site thermophysical property data according to rock-soil thermophysical property tests, and determining a site stratum structure and a variable temperature zone depth;
(2) a ground temperature monitoring hole for monitoring the change of the ground temperature of the field is distributed in the center of the field;
(3) at least three heat-affected radius monitoring holes are distributed beside any heat exchange hole at the downstream edge of the site groundwater along the flow direction of the groundwater, and at least three heat-affected radius monitoring holes are distributed beside any heat exchange hole at the upstream edge of the site groundwater and perpendicular to the flow direction of the groundwater;
(4) underground water monitoring holes are respectively arranged at the upstream and downstream of underground water outside the heat exchange field and at the center of the underground water flow direction in the heat exchange field, and three holes are distributed in a triangular shape;
(5) arranging temperature measuring probes at corresponding positions of each stratum on a temperature measuring cable according to the stratum structure, arranging at least one temperature measuring probe at the corresponding position of each stratum on the temperature measuring cable, and arranging the temperature measuring probes in the corresponding range of a stratum temperature change zone in an encrypted density manner;
(6) sequentially and correspondingly placing the manufactured temperature measuring cables into the monitoring holes, and additionally arranging a water quality detector and/or a water level meter in the underground water monitoring holes;
(7) corresponding individual temperature, flow and pressure sensors are respectively and correspondingly arranged in a main water inlet pipeline and a main water outlet pipeline of a ground source side and a user side, and the sensors and pump frequency converters arranged in all the pipelines and monitoring holes are connected to a computer room data acquisition control unit;
(8) the controller dynamically adjusts the system operation data according to the collected data: when the temperature difference between the outdoor environment and the ground and the temperature difference between the inlet water and the outlet water of the user are respectively greater than the set temperature, adjusting the heat pump and the water pump of the corresponding unit to enter a low-power operation mode; when the temperature difference is respectively smaller than the set temperature, adjusting the heat pump and the water pump of the unit to enter a high-power operation mode; when the temperature data of the heat affected radius monitoring holes perpendicular to the groundwater flow direction are larger than the temperature data of the heat affected radius monitoring holes corresponding to the radius along the groundwater flow direction, the heat exchange power of the system is correspondingly improved until the two monitoring data are equal.
2. The ground source heat pump monitoring method as claimed in claim 1, wherein in the step (2), one or more ground temperature monitoring holes are distributed according to the area of the heat exchange site, and are uniformly distributed in the site, and the hole depth is 2m or more deeper than the heat exchange holes.
3. The ground source heat pump monitoring method as claimed in claim 1, wherein in the step (2), one or more ground temperature monitoring holes are arranged according to the heat exchange site stratum structure, so as to ensure that the monitoring holes are positioned at the heat exchange area center of the same or different stratum structures.
4. The ground source heat pump monitoring method of claim 1, wherein in the step (3), the distance between the heat-affected radius monitoring holes adjacent to each other in the same distribution direction is 1-2 m.
5. The ground source heat pump monitoring method according to claim 1, wherein in the step (4), the distance between the groundwater monitoring holes located outside the field and the edge of the field is more than 50m, and the angle formed between the connecting line of any two groundwater monitoring holes and the groundwater flow direction is more than 15 degrees.
6. The ground source heat pump monitoring method as claimed in claim 1, wherein in the step (5), the temperature measuring probes within the temperature varying zone are densely arranged at intervals of 2.5 m.
7. A ground source heat pump monitoring method according to claim 1, characterized in that in step (6), the ground water monitoring hole sensor probe is located at a depth below ground water level.
8. The ground source heat pump monitoring method according to claim 1, wherein in the step (8), the adjustment of the power operation mode is specifically an adjustment of a unit power and a water pump frequency converter parameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210546143.7A CN114964551B (en) | 2022-05-20 | 2022-05-20 | Ground source heat pump monitoring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210546143.7A CN114964551B (en) | 2022-05-20 | 2022-05-20 | Ground source heat pump monitoring method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114964551A true CN114964551A (en) | 2022-08-30 |
| CN114964551B CN114964551B (en) | 2024-05-14 |
Family
ID=82972440
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210546143.7A Active CN114964551B (en) | 2022-05-20 | 2022-05-20 | Ground source heat pump monitoring method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114964551B (en) |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201429477Y (en) * | 2009-07-08 | 2010-03-24 | 郑州中南科莱空调设备有限公司 | Testing device for water source heat pump unit |
| CN202442821U (en) * | 2012-01-16 | 2012-09-19 | 华北电力大学（保定） | Soil source heat pump buried pipe heat exchanging and soil thermal property testing apparatus |
| CN102680515A (en) * | 2012-05-29 | 2012-09-19 | 上海三瑞化学有限公司 | Device for simulating ground source heat pump |
| CN102901588A (en) * | 2012-10-26 | 2013-01-30 | 北京奇迪惠民科技投资有限公司 | Heat quantity calculating device and heating ventilation air conditioning system |
| CN204286485U (en) * | 2014-11-10 | 2015-04-22 | 广西大学 | The wet migration effect pilot system of soil body heat during a kind of earth source heat pump runs |
| CN205066238U (en) * | 2015-10-30 | 2016-03-02 | 山东中瑞新能源科技有限公司 | Ground pipe laying formula earth source heat pump automatic control system |
| CN106770439A (en) * | 2016-11-28 | 2017-05-31 | 南京大学 | Rock-soil layer is layered Determination of conductive coefficients method |
| CN208012665U (en) * | 2018-04-10 | 2018-10-26 | 北京华清荣昊新能源开发有限责任公司 | A kind of groundwater heat pump on-line monitoring system |
| CN209277144U (en) * | 2018-12-14 | 2019-08-20 | 何勇军 | Electrical equipment groundwork detection device |
| KR20200013954A (en) * | 2018-07-31 | 2020-02-10 | 주식회사 위지트에너지 | Method for calculating COP of geothermal source heat pump system using integral calorimeter |
| US20200116894A1 (en) * | 2018-10-15 | 2020-04-16 | Colorado State University Research Foundation | Devices and methods for measuring temperature, oxidation reduction potential, and water-level within a subsurface formation |
| CN212510517U (en) * | 2020-05-20 | 2021-02-09 | 山东金孚瑞热能科技集团有限公司 | Intelligent modularized integrated hydraulic transmission and distribution device |
| CN113970573A (en) * | 2021-11-29 | 2022-01-25 | 深能科技(西安)有限公司 | System and method for actually measuring running performance of buried pipe of middle-deep geothermal energy |
-
2022
- 2022-05-20 CN CN202210546143.7A patent/CN114964551B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201429477Y (en) * | 2009-07-08 | 2010-03-24 | 郑州中南科莱空调设备有限公司 | Testing device for water source heat pump unit |
| CN202442821U (en) * | 2012-01-16 | 2012-09-19 | 华北电力大学（保定） | Soil source heat pump buried pipe heat exchanging and soil thermal property testing apparatus |
| CN102680515A (en) * | 2012-05-29 | 2012-09-19 | 上海三瑞化学有限公司 | Device for simulating ground source heat pump |
| CN102901588A (en) * | 2012-10-26 | 2013-01-30 | 北京奇迪惠民科技投资有限公司 | Heat quantity calculating device and heating ventilation air conditioning system |
| CN204286485U (en) * | 2014-11-10 | 2015-04-22 | 广西大学 | The wet migration effect pilot system of soil body heat during a kind of earth source heat pump runs |
| CN205066238U (en) * | 2015-10-30 | 2016-03-02 | 山东中瑞新能源科技有限公司 | Ground pipe laying formula earth source heat pump automatic control system |
| CN106770439A (en) * | 2016-11-28 | 2017-05-31 | 南京大学 | Rock-soil layer is layered Determination of conductive coefficients method |
| CN208012665U (en) * | 2018-04-10 | 2018-10-26 | 北京华清荣昊新能源开发有限责任公司 | A kind of groundwater heat pump on-line monitoring system |
| KR20200013954A (en) * | 2018-07-31 | 2020-02-10 | 주식회사 위지트에너지 | Method for calculating COP of geothermal source heat pump system using integral calorimeter |
| US20200116894A1 (en) * | 2018-10-15 | 2020-04-16 | Colorado State University Research Foundation | Devices and methods for measuring temperature, oxidation reduction potential, and water-level within a subsurface formation |
| CN209277144U (en) * | 2018-12-14 | 2019-08-20 | 何勇军 | Electrical equipment groundwork detection device |
| CN212510517U (en) * | 2020-05-20 | 2021-02-09 | 山东金孚瑞热能科技集团有限公司 | Intelligent modularized integrated hydraulic transmission and distribution device |
| CN113970573A (en) * | 2021-11-29 | 2022-01-25 | 深能科技(西安)有限公司 | System and method for actually measuring running performance of buried pipe of middle-deep geothermal energy |
Non-Patent Citations (3)
| Title |
|---|
| 熊亮萍等: "深循环热水型煤田地区温度场的特点及测量方法", 地球科学-中国地质大学学报, vol. 13, no. 03, 25 March 1988 (1988-03-25), pages 291 - 297 * |
| 胡彩萍: "地埋管换热影响岩土体传热因素及热影响范围分析", 山东国土资源, vol. 33, no. 8, 15 August 2017 (2017-08-15), pages 51 - 57 * |
| 赵晨曦等: "浅层地温能利用中的环境影响初探", 城市地质, vol. 11, no. 04, 15 December 2016 (2016-12-15), pages 15 - 23 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114964551B (en) | 2024-05-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109946103B (en) | Geothermal parameter testing system and method based on middle-deep buried pipe heat exchanger | |
| Florides et al. | Ground heat exchangers—A review of systems, models and applications | |
| CN202442821U (en) | Soil source heat pump buried pipe heat exchanging and soil thermal property testing apparatus | |
| CN102116749B (en) | Field measurement system for effective heat conductivity of ground source heat pump rock soil | |
| CN113418957B (en) | Soil body heat conductivity coefficient testing method and system | |
| Gehlin et al. | Determining undisturbed ground temperature for thermal response test | |
| CN108951724B (en) | Energy pile test monitoring system and test method | |
| CN102680515B (en) | Device for simulating ground source heat pump | |
| CN101105467B (en) | Soil thermal conductivity factor detection device and its method | |
| CN104374427B (en) | The soil body hot moisture migration effect test system and method in a kind of earth source heat pump operation | |
| CN106770439A (en) | Rock-soil layer is layered Determination of conductive coefficients method | |
| Le et al. | Measurement investigation on the feasibility of shallow geothermal energy for heating and cooling applied in agricultural greenhouses of Shouguang City: Ground temperature profiles and geothermal potential | |
| Cao et al. | A field study on the application of distributed temperature sensing technology in thermal response tests for borehole heat exchangers | |
| CN109344547A (en) | Freezing process design methods and device under a kind of seepage effect of combination stratum | |
| Cui et al. | Measurement and prediction of undisturbed underground temperature distribution | |
| CN114964551B (en) | Ground source heat pump monitoring method | |
| CN106354984B (en) | Temperature response calculation method of pile foundation spiral buried pipe under underground water seepage condition | |
| CN103018274A (en) | Rock-soil thermophysical property tester | |
| Mei | Heat pump ground coil analysis with thermal interference | |
| CN115655769A (en) | Heat exchange experiment system and experiment method for middle-deep layer double-pipe heat exchanger | |
| Chen et al. | Influence of underground drop seepage on temperature field in the buried pipe zone and performance of ground source heat pump system | |
| CN103792255A (en) | Rock soil cold and hot response testing system | |
| CN210690095U (en) | Closed energy well energy measurement appearance | |
| Zeh et al. | Monitoring of a large-scale geothermal collector system and a 5GDHC in Bad Nauheim | |
| KR100997162B1 (en) | Apparatus for measuring the effective thermal conductivity of the ground using multi-cable |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20240425 Address after: No.28 Jinshui Road, Jinshui District, Zhengzhou City, Henan Province Applicant after: Ecological Environment Geological Service Center of Henan Provincial Geological Bureau Country or region after: China Address before: No.56 Nanyang Road, Jinshui District, Zhengzhou City, Henan Province, 450000 Applicant before: NO.2 INSTITUTE OF GEOLOGICAL & MINERAL RESOURES SURVEY OF HENAN Country or region before: China |
|
| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information |
Inventor after: Wang Gang Inventor after: Wang Panke Inventor after: Li Peiying Inventor after: Li Yamei Inventor after: Cheng Jianqiang Inventor after: Wang Panpan Inventor after: Qin Guoqiang Inventor after: Shang Yongsheng Inventor after: Ge Yan Inventor after: Huang Hui Inventor after: Yang Zhen Inventor after: Li Yao Inventor after: Lu Wei Inventor after: Cheng Yu Inventor after: Shen Yunfei Inventor before: Wang Gang Inventor before: Wang Panke Inventor before: Li Peiying Inventor before: Li Yamei Inventor before: Cheng Jianqiang Inventor before: Wang Panpan Inventor before: Qin Guoqiang Inventor before: Shang Yongsheng Inventor before: Ge Yan Inventor before: Huang Xuan Inventor before: Yang Zhen Inventor before: Li Yao Inventor before: Lu Wei Inventor before: Cheng Yu Inventor before: Shen Yunfei |